I'd say, ***step up***.

> **step something up**

> 1. to make something more active. *I hope we can step the pace of business up in the next few days. We can step up business considerably by putting out a larger sign.*

> 2. to make something go or run faster. *The engineer stepped the motors up and the production line moved even faster. Please step up the speed of your activity.* [McGraw-Hill Dictionary of American Idioms and Phrasal Verbs](http://idioms.thefreedictionary.com/step+up)